Question

Medal! Please match the equation to the graph, also please show me how you got that answer. I would like to understand.
y=x^2
y=2x^2
y=2x^2
y=2(2)^x
attachment below

Answer 1

see from the graph
select any two points where you can identify both x,y
let us take (-1,1) and (1,4)
here in the graph , at x=-1, y=1
and at x=1,y=4
so substitute x and y in the options and check for correct function

Answer 2

since the graph is not shaped like a U it is not going to be any version of x^2

Answer 3

the most likely choice is of the form A k^x

such that: A k^0 = 2
and: A k^1 = 4

what is A and k ?

Answer 4

so it would be y=2(2)^x?

Answer 5

2(2)^x?

Answer 6

right!!!

Answer 7

thanks!!